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公开(公告)号：US20240275297A1
公开(公告)日：2024-08-15
申请号：US18564819
申请日：2022-03-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Akihiro NAMBA , Shigehisa AOYAGI , Noriyuki MAEKAWA
Abstract: A power conversion device includes: an inverter circuit; an AC conductor; a magnetic sensor that t detects magnetism generated when an AC current flows; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; and a first housing and a second housing that are formed by conductive members. The first housing covers one opening of a space located between the first magnetic body and the second magnetic body, the second housing covers the other opening of the space. The end of each of the first magnetic body and the second magnetic body is formed so that the distance to the first housing or the second housing is smaller than the thickness of each of the first magnetic body and the second magnetic body in the arraying direction thereof.
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公开(公告)号：US20250112562A1
公开(公告)日：2025-04-03
申请号：US18729865
申请日：2022-12-27
Applicant: HITACHI ASTEMO, LTD.
Inventor： Junpei KUSUKAWA , Takeshi TOKUYAMA , Takahiro ARAKI , Ti CHEN
Abstract: A power conversion device is provided with: a semiconductor device, two heat spreaders, and an external terminal; a circuit board having a first insulating layer; and a cooler. The circuit board has: a recessed section for the semiconductor device; a first conductor layer that forms a bottom surface of the recessed section; and a second conductor layer that is disposed in a layer different from the first conductor layer and which is exposed in the recessed section. One of the heat spreaders is in contact with the bottom surface of the recessed section and is bonded to the first conductor layer with a first metal bonding material. The external terminal is bonded to the second conductor layer with a second metal bonding material. The cooler is in press contact with the other of the heat spreaders with a second insulating layer different from the first insulating layer interposed therebetween.
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公开(公告)号：US20240251532A1
公开(公告)日：2024-07-25
申请号：US18564139
申请日：2022-02-25
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi TOKUYAMA , Takahiro ARAKI , Shigehisa AOYAGI , Noriyuki MAEKAWA
CPC classification number: H05K7/20927 , H02M7/003 , H05K1/181 , H05K2201/0323
Abstract: A power conversion device includes a plurality of circuit bodies each including a semiconductor element, and a printed circuit board having the plurality of circuit bodies mounted thereon and having a relay wiring connecting the plurality of circuit bodies to each other, a DC wiring, and an AC wiring, wherein at least one of the AC wiring and the DC wiring is connected to a conductor member.
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公开(公告)号：US20240413746A1
公开(公告)日：2024-12-12
申请号：US18702542
申请日：2022-10-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi TOKUYAMA , Masahiro SEO , Takahiro ARAKI , Shigehisa AOYAGI
Abstract: A power conversion device includes a substrate on which DC wiring and AC wiring are formed, and a plurality of circuit bodies that are electrically connected in parallel and have a first terminal and a second terminal each connected to the DC wiring or the AC wiring. The first terminals and the second terminals are adjacent to each other in the circuit bodies and protrude in a same direction, and the plurality of circuit bodies are disposed such that the first terminals and the second terminals are alternately arranged side by side on the substrate.
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公开(公告)号：US20240244807A1
公开(公告)日：2024-07-18
申请号：US18563667
申请日：2022-03-02
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Masahiro SEO , Noriyuki MAEKAWA , Shigehisa AOYAGI
CPC classification number: H05K7/20927 , H02M7/003 , H05K7/14322
Abstract: An electric power converter includes: an inverter circuit including a plurality of switching elements; a first capacitor and a second capacitor connected in parallel with the inverter circuit; a control circuit unit that controls the inverter circuit; and a connection conductor portion that connects the first capacitor and the second capacitor, wherein a conductive member is disposed between the control circuit unit and the connection conductor portion.
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Patent Agency Ranking
公开(公告)号：US20230395457A1
公开(公告)日：2023-12-07
申请号：US18034305
申请日：2021-09-17
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Shigehisa AOYAGI , Noriyuki MAEKAWA
IPC: H01L23/367 , H02M7/00 , H01L23/498 , H01L23/00 , H01L23/522 , H05K1/02
CPC classification number: H01L23/3672 , H02M7/003 , H01L23/49822 , H01L24/40 , H01L23/5223 , H05K1/0231 , H01L2224/40137 , H01L2224/40265 , H01L2924/19041 , H01L2924/13055
Abstract: A power semiconductor device includes: a substrate in which a positive electrode wiring connected to a first conductor on a high potential side and a negative electrode wiring connected to a fourth conductor on a low potential side are provided on one surface, and an output wiring connected to a second conductor and a third conductor is provided on the other surface so as to face the positive electrode wiring and the negative electrode wiring; and a first capacitor that smooths DC power supplied to a first upper-arm circuit body and a first lower-arm circuit body. The substrate is disposed between the first upper-arm circuit body and the first lower-arm circuit body. The first capacitor is disposed between the first upper-arm circuit body and the first lower-arm circuit body, and is connected to the positive electrode wiring and the negative electrode wiring on the substrate.
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公开(公告)号：US20230148137A1
公开(公告)日：2023-05-11
申请号：US17911962
申请日：2021-01-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Akira MIMA , Noriyuki MAEKAWA
IPC: H01L27/02 , H01L29/866
CPC classification number: H01L27/0255 , H01L29/866
Abstract: There has been a problem that when a value of a current flowing through a thermistor increases, a voltage drop generated in the thermistor increases, and variations occur in a clamp voltage. A semiconductor device includes: a switching element that is on-off controlled; and a surge voltage protection circuit connected between a positive electrode side terminal of the switching element and a control terminal of the switching element. The surge voltage protection circuit includes a first Zener diode, a second Zener diode connected in series with the first Zener diode, and a temperature characteristic compensating element having a temperature coefficient different in polarity from the first Zener diode and the second Zener diode and connected in parallel with the second Zener diode.
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公开(公告)号：US20220077731A1
公开(公告)日：2022-03-10
申请号：US17420831
申请日：2020-01-08
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Kinya NAKATSU , Takayoshi NAKAMURA , Akihiro NAMBA , Hiroyuki OOIWA , Hideki MIYAZAKI
Abstract: An object of the present invention is to provide a wheel drive device capable of suppressing a temperature increase in an electric motor and a power conversion device and suppressing occurrence of a failure of an electric component. Provided are: an electric motor having a stator 60 and a rotor 40; a stator holder 80 that holds the stator 60; a power conversion device 100 that converts power supplied to the electric motor; and a wheel which accommodates the electric motor, the stator holder 80, and the power conversion device 100 on the inner peripheral side. The stator holder 80 includes a flow path 90 through which a cooling medium flows. The flow path 90 is arranged between the stator 60 and the power conversion device 100.
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公开(公告)号：US20250157937A1
公开(公告)日：2025-05-15
申请号：US18840588
申请日：2023-03-16
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Shigehisa AOYAGI , Hideki MIYAZAKI
IPC: H01L23/538 , H01L23/373 , H01L25/18 , H10D1/68 , H10D80/30
Abstract: This power conversion device comprises a plurality of circuit bodies, a wiring board, and a smoothing capacitor, wherein: the wiring board has a plurality of stacked wiring parts to which the plurality of circuit bodies and the plurality of smoothing capacitors are respectively connected; and inter-phase wiring parts respectively formed between the plurality of stacked wiring parts; in the stacked wiring parts, positive electrode wires and negative electrode wires are stacked to overlap each other; in the inter-phase wiring parts, a plurality of the positive electrode wires and a plurality of the negative electrode wires are stacked to be separated from each other on a plane of the wiring board; and the inter-phase wiring parts have a via passing therethrough in the thickness direction of the wiring board.
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10.发明公开公开(公告)号：US20240042867A1
公开(公告)日：2024-02-08
申请号：US18266307
申请日：2021-09-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takafumi HARA , Toshiyuki AJIMA , Kyoshiro ITAKURA , Takeshi TOKUYAMA , Takahiro ARAKI , Shigehisa AOYAGI
CPC classification number: B60L15/20 , B60L15/007 , H02P27/06 , B60L2210/40
Abstract: A motor control device connected to a power converter that performs power conversion from DC power to AC power and controls driving of an AC motor that is driven by using the AC power includes a voltage command generation unit that generates a three-phase voltage command; and a gate signal generation unit that performs pulse width modulation on the three-phase voltage command and generates a gate signal for controlling an operation of the power converter, in which the voltage command generation unit adjusts the three-phase voltage command by using a zero-phase voltage based on a power factor of the AC power in an overmodulation region in which a modulation factor according to a voltage amplitude ratio between the DC power and the AC power exceeds a predetermined threshold value, and the gate signal generation unit generates the gate signal by performing pulse width modulation on the adjusted three-phase voltage command.
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